ML20128L710
| ML20128L710 | |
| Person / Time | |
|---|---|
| Issue date: | 06/19/1985 |
| From: | Jocelyn Craig, Mcintyre R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| Shared Package | |
| ML20128L675 | List: |
| References | |
| REF-QA-99900513 NUDOCS 8507250094 | |
| Download: ML20128L710 (10) | |
Text
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ORGANIZATION: TELEDYNE ENGINEERING SERVICES WALTHAM, MASSACHUSETTS REPORT INSPECTION INSPECTION NO.:
99900513/85-01 DATE(S):
1/7-11/85 ON-SITE HOURS:
62 CORRESPONDENCE ADDRESS:
Teledyne Engineering Services ATTN:
Mr. F. C. Bailey President 130 Second Avenue Waltham, Massachusetts 02254 ORGANIZATIONAL CONTACT: Mr. A. E. Johnson, QA Manager TELEPHONE NUMBER:
(617) 890-3350 PRINCIPAL PRODUCT:
Engineering and consulting services NUCLEAR INDUSTRY ACTIVITY:
Approximately 90% of Teledyne Engineering Services (TES) staff at Waltham, Massachusetts, facility is involved in nuclear activities.
ASSIGNED INSPECTOR:
P k 4DC ftp kW[65 R.P.McIntyre,'SpecialPropctsInspectionSect.
Date OTHER INSPECTOR (S):
M. Russell (EG&G)
APPROVED BY:
5 Gohn Craig, Chief, SpecM1 Project Inspection Section
' Date l
INSPECTION BASES AND SCOPE:
A.
BASES:
10 CFR Part 50, Appendix B and 10 CFR Part 21.
B.
SCOPE:
The purpose of this inspection was to review the following items:
(1) program verification of Teledyne Engineering Services (TES) owned computer code THRSAP, (2) computer program error handling procedures, and (3) pipe support design calculations.
l PLANT SITE APPLICABILITY: Watts Bar (50-390, 50-391) l l
hjj7250094850711 99900 EEM E
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ORGANIZATION:
TELEDYNE ENGINEERING SERVICES WALTHAM, MASSACHUSETTS
=
REPORT INSPECTION N0.:
99900513/85-01 RESULTS:
PAGE 2 of 4 A.
VIOLATIONS:
None B.
NONCONFORMANCES:
1.
Contrary to Section 5.1 of Project QA Program for TES project 6235C and Section 6.0 of Impell procedure WBNP-001 Rev 0., Watts Bar pipe support calculations 62-2CVC-R168 and 62-2CVC-R253 did not include documented justification for the omission of the effects of forces and moments due to pipe movements on the sizing of welded plate attach-ments, nor was there any documentation of qualification by engineering judgement.
2.
Contrary to Section 3.1 and 3.7 of the TES Quality Assurance Manual, a vertical friction force was incorrectly applied at Node 9 of the GTSTRUDL model for Watts Bar Pipe Support calculation 62-2CVC-R42, TES project 6235C.
Additionally, there was no documentation of this error with respect to structural adequacy of the support.
C.
UNRESOLVED ITEMS I
None D.
OTHER FINDINGS OR COMMENTS 1.
Computer Program Verification:
The development and verification of the computer program TMRSAP, which is used by TES in the design of safety related items was reviewed during this inspection.
Technical Engineering Procedures TEP-1-005, Application Computer Program Deve-lopment, was reviewed and utilized throughout the inspection of TMRSAP.
The computer code THRSAP, which was developed internally by TES, is j
used for static and dynamic analysis of linear piping systems.
It employs a finite element solution technique with a library con-sisting of curved and straight pipe elements, and a boundry element for simulation of pipe restraints.
THRSAP provides capability for l
l analysis of such static loading as deadweight, thermal, and pressure i
elongation loadings.
Capabilities for dynamic analysis include res-l ponse spectrum and time history (both modal and direct) analysis.
Solution methods include Gaussian elimination for static solutions, l'
and determinant saarch or subspace iteration for the modal dynamic solutions.
Direct integration is performed with the Wilson-0-mtthod.
O
ORGANIZATION: TELEDYNE ENGINEERING SERVICES WALTHAM, MASSACHUSETTS REPORT INSPECTION NO :
99900513/85-01 RESULTS:
PAGE 3 of 4 TES verified TMRSAP by a comparison of the output of 22 verification problem solutions with either the results of hand calculations or the output of other computer codes (STARDYNE, EPIPE, ANSYS, AND ADLPIPE).
During this inspection all verification problems were reviewed.
Although the verification of this code was done according to a general design control procedure (Section 3.0 of the TES Quality Assurance Manual), it was found to meet the requirements of the latest TES pro-cedure controlling computer code verification (TEP-1-005), with one exception.
The exception was that the source code listing and compu-tation outputs were not included in the verification manual.
- However, the computation output includes a source code listing that was clearly identified in the verification manual and was readily available at the TES office.
No violations or nonconformances were identified during
(
this part of the inspection.
2.
Computer Program Error Handling Procedures:
The procedures fo.- handling computer program errors are covered in Section 14.0, Error Reporting, TEP-1-005 Rev 1.
TEP-1-005 was revised 12/19/d4 to include error reporting procedures as well as a Computer Program Error Notification and Disposition Report form, which is completed for all reported computer program errors.
If it is deter-mined that a program error can impact current or previous anclyses, then a Computer Program Error Project Disposition Report form must be completed.
An investigation by TES project is initiated to search for and correct any current or previous analyses affected by the error.
Since the procedures for error reporting were recently put into effect, the NRC inspector was unable to track a code error through the new system. TES has received a large number of computer code error reports from computer service bureaus, Control Data Corporation and United Information Services.
TES is in the process of performing an investi-gation of the errors for the computer program ANSYS which have the poten-tial to impact past analyses.
The search and disposition of these errors on past and present TES projects may be reviewed during a future NRC inspection.
No violations or nonconformances were identified during this part of the inspection.
)
3.
Pipe Support Design Calculations:
TES is a sub-contractor to Impell and provides services for the design
{
and analysis of certain pipe supports for the Watts Bar Nuclear Power Y
ORGANIZATION: TELEDYNE ENGINEERING SERVICES WALTHAM, MASSACHUSETTS REPORT INSPECTION NO.: 99900513/85-01 RESULTS:
PAGE 4 of 4 Plant.
Impell has the overall contract with the Tennessee Valley Authority (TVA). TES will provide support analysis packages and support drawings to Impell for the systems within their scope of the contract.
During this inspection a sample of pipe Watts Bar Pipe support drawings and design calculations for the Chemical Volume and Control System (CVCS) were chosen for a detailed review. The review included verifi-cation of compliance to TVA Pipe Support Design Procedures, Impell Engineering Proceoures for Pipe Support Designs, TES Project 6235C QA program requirements and applicable design codes and criteria.
The inspectors reviewed the correctness of the numerical calculations related to support member stress, member deflections, weld design, base plate analysis, and concrete anchor bolt analysis. Additionally, computerized input and output for computer programs such as GTSTRUDL and BASEPLATE II was reviewed. The inspector also examined the appro' priateness of references and applicability of assumptions used in these programs.
Within this area of the inspection, two nonconformances were identified (see Section B, items 1 and 2 above). These items are discussed below.
Impell Engineering Procedure for Pipe Support Design (WBNP-001) expli-citly states that when engineering judgement is used as a means of qualification for a portion of a calculation, it should be documented and justified in the calculation package. When reviewing pipe support calculations 62-2CVC-R168 and 62-2CVC-R253, TES project 6235C, the NRC inspector found instances where engineering judgement was being uti-lized but not documented. These calculations did.not include forces and moments resulting from piping movement when sizing the welds for the attachment of rigid sway struts to a bolted base plate and an embedded plate. This was confirmed during interviews with the project engineer on the Watts Bar Project.
A vertical friction force was incorrectly applied at Node 9 of the GTSTRUDL model for a welded frame in the calculation of pipe support 62-2CVC-R42.
It should have been applied at Node 5 of the model.
Since there was already a horizontal load at Node 5, the error re-sulted in lower stress for the member incorporating Node 5.
- However, the loading conditions on the frame were low and the total ratio of calculated stress to allowable stress was well below the ASME code limit of 1.0 for combined stresses. Therefore, this input error will not affect the structural adequacy of this support.
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